Molding and casting machine



I Jun 24 192451;

- I 1,498,562 M. M. MAUPIN I MOLDING AND CASTING MACHINE Filed April 5.1922 MALCOLM M. MAUPIN, 0F CINCINNATI, OHIO.

MOLDING AND cas'rmo acrame.

Application ,flleii April 5,

To 077 10770721 if may concern.

Be it known that I, MALCOLM M. lAUPIN, a citizen of the l'nited Statesof America, and a resident of Cincinnati. in the county of Hamilton andState of Ohio, have. invent ed certain new and useful Improvements in.Molding and Casting Machines, of which the following is a specification.

)1 y invention relates to molding and casting :nachinesthat areespecially adapted to dentists and jewelers uses, and it has for itsmain object to combine the centrifugal and racuum elements, that are atresent separately used, into. one unit and engage the same in mutualcooperation to displace the air from the molding-cup,'keeping the cup'from expanding and allowing the fluid for the casting to enter the moldwhen the same is cooled through the abstraction of heat.

Another object of my invention is to set up a relative axial androtational movement, automatically adjusting the position of the mold.crucible and their appended parts, thus preventing an angular and linearsep: ration from the same.

Another object of my invention is to construct a machine that is cheaplymanufac tured, easily assembled. quickly operated to any degree ofaccuracy. and adapted to meet the requirements of dental and jewelrycastin'gs and other kindred operations.

Such class of machines is not broadly new, but here is no device, for hespecific purpose herein, that exhibits the results of careful study andskill to more than a. limited extent, or that is so designed andorganized as to constitute an efficientand a really desirable device.

My object has been to de sign amore nearly perfect and efi'ectivemachine of this character and to improve the. I

construction of the details that enter into its construction. 1

In the accompanying sheet'of drawings, Figure 1 is an elevation of mydevice; Figu're 2, an end elevation of the same; Figure 3, a fragmentarysectional plan on the line 3, 3, of Figure 1; Figure .4, a cross sectionthrough the main shaft, showing the central adjusting-Weight and thesupporting terminals of the crucible thereon; Figure 5, a

plan of the core or mold container or casing;

Figure 6, a broken-oil portion or section of the mainshaft between thespokeqibs; Figure 7, a plan view of the fastenin device for themold-casing; Figure 8, a. side View 1922. Serial No. 549,793.

of the same and Figure 9. a detached view of the clamping device onalarger scale.

The tubular casing or hollow wheel rim 1 that is composed of a circularshell having a chamber orbore'2,.of any proportionate size, issecured toan upright supporting frame 3" that mounts, at its upper end, ahorizontal rotatable shaft 4. Mounted on the inner frame-portion of vthetubular-memher 1. and integrally extending from the. same. is arectangular shouldeu 5 with reduced square portions adapted tocoactinglyengage the core or mold container 6. Said container 6isprovided with. the usual plastic material 6" for mold forming, and hasat'its central portion. the typical cavity 8 of any desired structuralelements, with an attached gutter or channel 9 at its upper end toreceive the heated fluid within the prepared mold.

To more firmly grip the lower ends of the mold-casing 6 for an air-tightcontactingoperation, a clutch device 29, Fig. l, is arranged, suchclutch comprising a rectangular face plate with a hingechportion 30.

Tn operating the clamp 29 I insert the pro jecting-lug 32 into theaperture 38 between the standards 30. Said standards are. rigid and nothingeahle on the inner part. of the molrlrcasing. The outer standards30are.

in slidable-engagement with aligned sections 00' 1 11 and comprising adepression 12 in which the metal is to be melted and transferred to themold 8 by means of the gutter or channel .9. i The melting process ofthe amalgam in the depression 12 of the crucible 10 is generallyproduced by a common blow-pipe,

with a range of movement in any direction the operator may desire.

13 1s a clamp or locking-ring on the shaft 4 for the crucible-section10, and 14 is a balance-weight provided on the extended op- The outerstandards 30 have disposed to the in 'ianrim 1, will act,

i that, its gravitating,

balanceeight posits end adapted to maintain the same in linearalignment. vThe balance-weight 15, oppositelyot-mold 6, on the tububyits predetermined weight, asa component member to the said c 14 for therelative adjust ment of the mold 6 and the crucible 10. On the "innerperiphery of the tubular-rim 1 is an angularlydiverging orificed 'boss16 that is provided with a manually-operated miniature air-pump 17. Abalance-weight 18, that is diametrically-opposite to said airpump 17, onthe inner periphery of the said tnhular-rim l, coincides in weight withsaid air-pump for uniform adjustment. A pendulum-shaped balance-weight19, Fig. 4, is loosely-attached to the main shaft 4 so swingingmovements will cause compensating action of the crucible and moldelements for harmonious interengagement with each other. The balance-Weights 15 and 18 are preferably constructed of amultiple ofdetachable plates or Washers for conveniently adjusting and harmonizingtheir 0 posing weights.

in operating my evice, I exhaust all air from the bore or interior 2 ofthe tubularcasing 1 through the manually-operated pump 17 for expellingall aerial matter in the mold and tubular-rim 1. To rotate thetubular-casing 1' in quick revolutions with its various attachments, a'gyroscopic-arrangeinent in the peripheral groove 25 of the Wheelerspool 26 is so arranged, that by pulling the end of the wound cord orrope .27, grouped in several layers in the groove 25, the Well-knownlaws of gyroscopic-movement will cause its appended parts to move inquick or in stant rotation, diametrically conducting or shooting theheated metal in the crucible 10 the shaft 4 and eeasez is of'thecrucible-sections 11 and through the gutter or channel 9 into the mold8. The valve 23 is opened simultaneous with the shooting hr whirling ofthe molten or fused metal into the mold, to extract the heated airarising from the metallic-fillings and by combining the force ofsuction, on one side, and centrifugal force, on the other side, betterresults of the metallurgic operation are produced. In order to keepthe'terminal-portion of the slidable crucible from oscillating againstthe inner edge of the wheel-spoke 28. a collar 34 is provided to engagethe shaft 4, said collar having a tooth-like dent 35 to receive acircular wire or like binding-element 35 for fastening purposes. Toquickly ascertain the vacuum-contouts in the tuhular-casing l, theregistering-gauge 36 is fastened, between the pair of balanceweights 18,18, indicating the low or the higlnpressure Within the air-chamber, and.deducting from the series of plates 20 an equal number of said plates toequalize the weight of the gauge .in register with the \veightof theopposed air-pump 17.

in a molding and casting machine, a rotatable tubular rim or casing, amoldingmeinber provided within said casing, spaced supportingstandard-memhers a main shaft rotatahly-mounted in the saidstandardmen'lbers, a valve-chamber mounted on the said casing andprovided with inlet and outlet ports that communicate with the said moldcasing closing means adapted for said ports, and air-exhausting means onthe inner-peripheral side of said casing and operativelyconnected withthe valve-chamber,. substantially as shown and described.

MALCOLM M. MAUPIN.

the outer periphery of for exhausting air therefrom,

